Improvement in knitting-machine burrs



NITED STATES WILLIAM Il. GARR, OF TROY, NEW YORK, ASSIGNOR TO HIMSELFAND NELSO)T l). AKIN.

IMPROVEMENT IN KNlll'TlNGi-MACHINE BUPRS.

Specification forming part of Letters Patent No. 43,636, dated July 26,1664.

To all whom, it may concern:

Be it known that I, WILLIAM H. GARR, of

the city of Troy, in the countyk of Rensselaerand State of New York,have invented certain new and useful Improvements in Burrs forKnitting-Machines, of which the following contains a full and exactdescription, 'reference being had to the annexed drawings, in which-Figure 1 is an end view, Fig. 2 a side view with part of the bladesremoved, and Fig. 3 a section at or about the line z ,a in Fig. l, of aknitting-machine burr embodying my invention. Fig. 4 is a side view ofone of the blades; Figs. 5 and 6, perspective views of the two parts ot'the slotted hub which holds the blades, and Fig. 7 a side view of thepart by which the two parts of the slotted hub are secured together inthat burr-like parts being marked by the same letters in all thefigures.

Before this invention burrs for knitting machines had been made withremovable wings or blades, clamped in a slotted hub in such ina-nnerthat the blades, when broken or worn out, could be readily removed andreplaced by new ones upon simply loosening or removing he devices bywhich the blades were clamped in the slotted hub, examples ot' suchknittingburrs being shown in the specifications and drawings ofEnglishPatent No. 10,7 24, granted in the year 1845, and United States LettersPatent No. 35,565, dated June 10,1862; but in such knitting-burrs theremovable blades were securedin a slotted hub by rings or disks clampedagainst the lateral edges ofthe blades outside of the slotted part ofthe hub at its ends, so that that part of the body of the burr whichheld the blades had a considerably greater thickness than the slottedpart ofthe hub in which the blades were-inserted, which greaterthickness rendered the burr much more bulky and far less convenient touse in some kinds of knitting-machines than the common knitting-burrhaving blades oflike width sol dered fast in a simple slotted hub.

Now, one part of my invention consists in making the inner ends ofremovable wings or blades A of knitting-machine burrs each wit-h adoveta-il or flaring projection, b, Fig. 4, and two shoulders, c c, oneon each side of the said flaring projection, in such manner that bladesthus formed can be firmly secured in a hollow slotted hub of suitableconstruction by means of devices located within or inside ot' thehub,ins tead of at the outer ends or on the outside thereof.

Another part ot' my invention consists in making a slotted hub foraknitting-machine burr of two separable rings, D D', having equal seriesof slots e e in and around them, and held together, end to end, by acentral screw-bolt, F, or its equivalent, and having the unslottedinside parts ot their inner ends, g g, made hollowing or inclinedoutward toward each other, so as to thereby form anoutwardly-narrowedannular space, h, Fig. 3, between the two hub-rings in such manner thata series of separate knitting-burr blades of suitable size and shape canbe freely inserted and iirmly clamped within and by the said unitedhub-rings themselves without the aid of any other device or devices.

And another part of my invention consists in the arrangement oi a seriesotA knittingburr blades, A, each having on its inner end a dovetail orflaring projection, b, and shoulders c c on both sides thereof, incombination with a knitting-burr hub composed of two rings, D D', havingequal series of slots e ein and around them, and held together, end toend, by a central screw-bolt, F, or its equivalent, with the insideunslotted part,g g, ot their inner ends inclined outward toward eachother in such manner that the said inclined inner ends, g g, of thehub-rings clamp against the inclined edges it' of the daring projectionsb of the blades, and thereby draw and hold the blades into and withtheir shoulders c c tight against the bottoms of the slots e ein thehubrin gs, and thus produce a cheap and durable knitting-burr, fromwhich any or all of its blades can be readily removed and replacedby-others upon simply loosening the hub-rings, and in which the bladesare clamped in a slotted hub, not only by means of devices locatedinside ot' the hub, but by means oi' the inner ends of the two unitedhubrings that constitute the slotted hub itself. And such a knitting-burr is thinner and lighter, and generally moreV readily applied toknittingmachines of close and compact construction than a knithereindescribed.

ting burr having projecting blades of like width clamped in a slottedhub by means of devices applied to the edges of the blades at the outerends or on the outside ofthe slotted hub.

What I claim as new and of my invention, and desire to secure bv LettersPatent, is

l. A knitting-burr blade, A, having on its inner end a dovetail orflaring projection,b, and lateral shoulders c c, substantially as 2. Aknitting-burr hub composed of two rings, D D', slotted and securedtogether, end to end, and having an outwardly-narrowed annular space, h,formed by and between the inner ends of the said united hub rings,substantially as herein described.

3. The combination of a series of wings or blades, A, each having adovetail or flaring projection, b, and shoulders c c, on its inner end,with a hub composed of two rings, D D', slotted and clamped together,end to end, and having an outwardly-narrowed annular recess, h, formedby and between the inner ends of the said united hub rings,substantially as asherein described.

WM. H. CARR.

Witnesses:

THoMAs J. CORNELIUS, AUSTIN F. PARK.

